Typewriting-machine



W. A. SCHMIDT.

TYPEWRITING MACHINE.

APPLICATION FILED nEc.4, 1919 1,388,207. Patented Aug. 23, 1921* -INVENTUR WITNESSES M w W T MEPrW( HE ATTORNEY UNITED STATES PATENT OFFICE.

WLLHELM A. SCHMIDT, OF ILION, NEW YORK, ASSIGNOR TO REMINGTON TYPE- WRITEB COMPANY, OF ILION, NEW YORK, A CORPORATION OF NEW YORK TYPEWRITING-MACHINE.

To all whom it may concern:

Be it known that I, WILHELM A. SCHMIDT, citizen of the United States, and resident of Ilion, in the county of Herkimer and. State of New York, have invented certain new and useful Improvements in Typewriting-Machines,' of which the following is a specification.

My invention relates to pivot wire tighteners for typewriting machines, and has for its object to provide means for maintaining the pivot wire so secured to its support that said wire will not be displaced as the result of the actuation of type bars or through accident. My present invention was designed as an improvement on the prior invention of Oscar Woodward disclosed in his appli cation filed November 13, 1919, Serial No. 337,638..

To the above and other ends which will hereinafter appear, my invention consists in the features of construction, combinations of devices, and arrangements of parts hereinafter described and particularly pointed out in the claims.

In the accompanying drawings which illustrate the preferred form of the invention,

Figure 1 is a fragmentary front to rear sectional view showing the type action,

mounting and some associate parts of a typewriting machine embodying the invention.

Fig. 2 is a front elevation of the type bar segment. v

Fig. 3 is an enlargedfragmentary. plan view, partly in section, showing one end of the segment; and v i Fig. 4 is an enlarged fragmentary front view of one end of the segment, parts being broken away.

The machine partly illustrated in Figs. 1 and 2 is of the general character of that disclosed more fully in the patent granted to Oscar Voodward, June 8, 1920, No. 1,342,489.

Referring to said Figs. 1 and 2, 1 designates the top plate to which is suitably fixed a vertically arranged type bar support or segment 2 having a series of radial slots 3 in which are arranged front strike type bars 4 perforated to receive a common pivot wire 5 which is mounted on the segment 2. The set of type bars are normally supported at their free ends on a type rest 6 and are adapted to strike against the front face of a platen 7 cooperating during erations with a center guide 8 Specification of Letters Patent. Patented A 23 1921 Application filed December 4, 1919. Serial No. 342,388.

printing opfixed to the segment plate or-support 2. The heel portlons of the type bars are formed with slots 9, these slots being engaged by headed pins 10, each of said pins being carried by the long arm of a bell crank 11 having a stationary pivot 12, and connected at its short arm by a link 13 with a key lever 14, the set of key levers being arranged within the base 15 of the main frame.

The pivot wire 5 is as usual arcuate or curved to conform to the arc of a circle and is seated in a bearing that is correspondingly curved or arcuate, said bearing being a slot or groove16 cut in the rear face of the segment plate 2. The slot or bearing 16 is formed near the bottom or outer curved surface of the segment so that the fulcrum wire when seated in said slot extends through and transversely of the radial slots 3 in which the type bars are arranged. The opposite upper and lower curved walls or faces of said slot are slightly depressed in conformity with the round pivot wire which is adapted to fit loosely in its bearing so that it may be readily slid in and out of the slotway 16 from either end. The diameter of the pivot wire, however, is greater than the rear open side of the slo It is the main purpose of my present invention to-secure the pivot wire in position after it has been slid into place in its slot or bearing, fixing it so that it will not vibrate, or wink as it is called, but will provide a constant center of rotation for the type bars, and in carrying out the invention I provide pivot wire tightener' devices which, as shown, are applied at each end of the pivot wire, although in some cases it may not be desirable to provide such devices at both ends of said pivot wire. In the present case each end of the body portion of the pivot wire 5 is formed with a coned or neck portion '5" which terminates in a head or enlargement 5 the under face of this head where it joins the neck 5* being flat or plane and its top rounded oil. The wire 5 is of such length that at each end the neck 5 and head 5* project above the flat top face of the segment '2; 'Cooperating with the projecting end portions of the wire are elements preferably elastic or resilient in the form of bow or curved spring plates 17. These plates or rocking members rest on top of the segment 2, their outer ends being formed with open mouthed slots 18 and their opposite or inner ends are provided with elongated slots or openings 19 which receive headed screws 20. These screws pass down through the slots 19 and engage in threaded openings 21 formed in thetop of the segapplied to the inner arms by turning down the screws 20 is transmitted through the slotted outer arms of said plates or levers to the heads 5", the result being that an upward pull is applied to the wire 5 at its end. This tension or pull forces or presses the wire against the upper or shorter curved wall or face of its bearing slot and the construction is such that this pressure is 'suflicient to fix the wire firmly in place so that it will not be dislocated or disturbed during actuations of the type bars fulcrumed or pivoted on it. By reason of the yielding or spring of the elastic or resilient plates 17 and of the limit to which the screws 20 may be screwed in, it is possible so to limit the pull and force that can be applied to the pivot wire as to prevent harmful results such as distortion of the pivot wire itself or distortion or breakage of the parts of the segment adjacent to it. The length of the slots 19 is such that the spring plates 17 may he slid inward toward the middle of the machine so as to disengage their slotted outer ends from the pivot wire, thus permitting the pivot wire to be readily withdrawn without the necessity of entirely unscrewing and removing the screws 20. Preliminary to such withdrawal it is onlynecessary tounscrew the screws to a sufiicient extent to permit the plates 17 to be easily slid over the top face of the segment. 7

Various changes may be made without departing from my invention.

' What I claim as new and desire to secure by Letters Patent, is

1. In a typewriting machine, the combination of a type bar support, type bars, a pivot wire for said type bars, a lever member of the first order having one arm c0- operative with said pivot wire, and means cooperatlve with the other arm of said lever member to apply pressure from said lever to said pivot wire to fix said pivot wire se curely in position,

2. In a typewriting machine, the combination of a type bar support, type bars, a pivot wire for said type bars, a plate-like lever'of the first order having one arm cooperative with said pivot wire, and a screw The plates 17 in effect cooperative with the other arm of said platelike lever to control the pressure exerted by said lever on said pivot wire.

3. In a typewriting machine, the combination of a type bar support, type bars, an

arcuate pivot wire bearing common'to said type bars and seated in a slotjin said type bar support, a yieldable plate mounted on said support and cooperative at one end directly with said pivot wire, and an adjustable device cooperating with the other end of said plate to press said wire against one side of said slot. 7

4. In a typewriting machine, the combinawire common to said type bars and provided at one end with a head that is connected to the body portionot said pivot wire by a neck, a plate slotted at oneend to cooperate with said neck, and a screw engaging in an opening in said plate and effective to apply pressure through said plate to the head of said pivot wire.

tion of a type bar support, type bars, a pivot 5. In a typewriting machine, the combina- 7 tion of a type barsupport, type bars, a pivot wire common to saldtype bars and provided at one end with a head that is connected to the body portion of said pivot wire by a neck, a plate slotted atone end to cooperate with said neck, and a pivot wire tightening screw engaging in an opening insaid plate, said opening being elongated to permit said plate to be withdrawn from engagement with said wire while said screw'remains engaged in said opening.

6. In a typewriting machine, the combination of a type bar support, type bars, a pivot wire on whlch said type barsare mounted,

a bow-spring connected to said pivot wire,

and a screw effective on said bow spring to control the pressure it exerts on said pivot wire to hold said pivot wire securely in place.

7. In a typewriting machine, the combination of a type bar support, type bars, a type bar pivot wire having headed ends, plates cooperative with said headed ends and bearing on the type bar support, and pressure scrwes operative on said plates.

8. In atypewriting machine, the combina-, tion of a type bar support, type bars,.a type bar pivot wire having headed ends, rocking members slotted to cooperate with said I headed ends, and screws loosely engaging in openings in said membersand adjustable to control the pressure exerted by said members on said pivot wire.

Signed at Ilion, in the county of Her-- kimer and State of New York this 28th day of November, A. D. 1919.

WILHELMA. SCHMIDT. Witnesses I ARMEDA KAPP,

ETHYL SPARBIER. 

